Kenwood KDC-7024, KDC-7024Y, KDC-8023 Service Manual

CD RECEIVER

KDC-7024/Y KDC-722 KDC-8023

SERVICE MANUAL

© 2003-2 PRINTED IN JAPAN B53-0036-00 (N) 3379

CD mechanism operation description is not in this service manual.

Please, refer to service manual X92- 4030-0x (B51-7867-00).

CD mechanism extension cord : W05-0935-00

Panel assy

(A64-2981-01): KDC-722, (A64-2983-01): KDC-8023

KDC-722 only

50W4

COMPACT

DIGITAL AUDIO

Escutcheon (B07-3078-01)

Panel assy

(A64-2987-01): KDC-7024/Y

50W4

COMPACT

DIGITAL AUDIO

Panel assy (A64-2995-02): KDC-722/8023

Escutcheon (B07-3078-01)

Escutcheon	Mounting hardware assy	Plastic cabinet assy	DC cord (ISO)
(B07-3078-01)	(J21-9823-03)	(A02-2731-03)	(E30-4942-05)
			: KDC-7024/Y

Remote controller assy	Remote controller assy	Lever	Screw set
(RC-505)	(RC-420)	(D10-4674-04) x 2	(N99-1723-05)
(A70-2040-05)	(A70-2026-05)		: KDC-722/8023
: KDC-722	: KDC-8023	Size AA battery
		(Not supplied)

Panel assy (A64-3003-02): KDC-7024/Y

DC cord

(E30-6062-05) : KDC-8023

(E30-6106-05) : KDC-722

Antenna adaptor (T90-0552-05)

: KDC-7024/Y

Screw set (N99-1734-05)

KDC-7024/Y,722,8023

HOW TO THE PANEL MECHANISM ASSEMBLY

1.Fixed the position of operation side

(Fixed the horizontal position when the panel opened) q The mounting hardware (281) of operation side is rota-

tion (A) into the stop position with close side.

w As figure (B) line is just above and the gear (230) attached to pin.

2.The slider assembly insert to bottom chassis q The bracket for display panel (284) is leave down, in-

sert to the chassis (702). (C)

	A
Rotary to the	281
stop position

B

230

This line attached just above

Fig. B

(This figure from look at B arrow)

284

SW

C

702

wThe slider assembly insert to the chassis (702) after that shift (D) direction.

eThe bracket for display panel (284) is raised (E) direction.

r Keep the raising conditions, the slider assembly is shift

(F) direction.

(Note) Do not bend the knob of chassis detection switch when the slider assembly insert.

284

F

E

SW

D

702

3

		BLOCK DIAGRAM			KDC-7024/Y,722,8023
(X25-966)				8V			AUX IN
			IC2			Q59,60
TUNER			FM			PRE MUTE	PRE OUT
AUDIO OUT			AM				(REAR/NF)
Q102,103			CD	E-VOL
			CH
AM+B				&
				MPX
	8V	8V
	Q104		QUAL			PRE MUTE	PRE OUT
8V	BUFFER						(FRONT)
		Q53
S-METER		BUFFER	SW5V			IC4
		SW5V					SP OUT (FL)
	IC12
							SP OUT (FR)
	RDS	IC1				POWER
	DECODER						SP OUT (RL)
						IC
							SP OUT (RR)
				IC8	MUTE
CD					DRIVER	BU5V
BU5V
8V
SERVO							WIRED REMO/
CD4.7V
							OPEL DISP I/F

					Q25,26
					P-CON		P CON
					Q23,24
CH		u-COM			ANT-CON		ANT CON
					Q29
BACK UP					EXT AMP		EXT.AMP.CON
					Q30
BU5V					DIMMER		DIMMER
Q501	BU5V
					TEL MUTE		TEL MUTE
EEP5V
					Q33
IC1					ACC DET		ACC
EEPROM					Q32
TDF UNIT (X16-208)					B.U DET		BACK UP
DISPLAY UNIT			IC7			Q1,2
(X16-214)
			RESET		BU5V	BU5V
BU5V	BU5V	BU5V		BU5V		Q3
					SW5V
IC2	IC1	Q6				SW 5V
		PANEL	IC13	IC14		Q4,5
	LCD DRIVER	SW5V
			MOTOR	MOTOR
					SW14V
LCD DRIVER	WITH					SW 14V
		IC3	DR	DR
	KEY MATRIX
		REMOCON	SERVO			Q6-8
					A8V	A8V
			PANEL			Q9,34
	LCD		MECHA		SERVO	SERVO
SWITCH UNIT			SW5V			Q11-14
						ILL+B
(X16-219)
		BU5V				IC5
					CD5.0V
ROTARY	KEY					SW REG
		RESET SW KEY ILL
ENCODER	KEY MATRIX

3

KDC-7024/Y,722,8023

COMPONENTS DESCRIPTION

● SUB-CIRCUIT UNIT (X16-2080-10)

Ref. No.	Application/Function	Operation/Condition/Compatibility
IC1	E2PROM	For security

● SUB-CIRCUIT UNIT (X16-2140-10)

Ref. No.	Application/Function	Operation/Condition/Compatibility
IC1	LCD driver	KEY Input
IC2	LCD driver
IC3	Remote control sensor
Q1	KEY scan start SW	ON when the base goes “L”.
Q5, D26	VLCD AVR
Q6	Remote control sensor power supply SW	ON when the base goes “L”.
Q11	Dimmer control	LCD back light control. OFF when the base goes “L”, ON when the base goes “H”.

● SWITCH UNIT (X16-2190-10)

Ref. No.	Application/Function	Operation/Condition/Compatibility
Q1	DSI (Disabled System Indicator)	DSI blinks when the base goes “H/L”
Q2	KEY illumination SW (GREEN)	ON (KEY illumination green) when the base goes “H”
Q3	KEY illumination SW (RED)	ON (KEY illumination red) when the base goes “H”

● ELECTRIC UNIT (X25-966x-xx)

Ref. No.	Application/Function	Operation/Condition/Compatibility
IC1	System -com
IC2	E-vol & N.C. & MPX
IC3	Regulator IC for A8V
IC4	Power IC
IC7	Reset IC
IC8	Logic IC for muting
IC12	RDS decoder IC
IC13, 14	Motor driver IC for panel mechanism
IC15	ROM IC	For ROM correction.
Q1, 2	B.U.5V AVR	While BU is applied, BU5V AVR outputs +5V.
Q3	SW5V	When Q3’base goes Lo, SW5V outputs +5V.
Q4, 5	SW14V	When Q5’base goes Hi, SW14V outputs 14V.
Q6~8	AUDIO 8V AVR	When Q6’base goes Hi, A8V AVR outputs 8.4V.
Q9, 34	SERVO+B AVR	When Q34’base goes Hi, S+B AVR outputs 7.4V.
Q11~14	ILL+B AVR	When Q11’base goes Hi, AVR outputs 10.5V.
Q23, 24	P-ANT SW	When Q23’base goes Hi, P-ANT SW outputs 14V.
Q25, 26	P-CON SW	When Q26’base goes Hi, P-CON SW outputs 14V.
Q27, 28	P-CON protection	Protect Q27 by turning on when P-CON output is grounded.
Q29	Ex Amp control buffer
Q30	Small lamp det SW	When Q30’base goes Hi, Q30 is turned on.
Q32	BU det	When Q32’base gose Hi, Q32 is turned on.
Q33	ACC det	When Q33’base gose Hi, Q33 is turned on.
Q51, 52	Mute driver	When a base gose Lo, mute driver is turned on.
Q53	Noise buffer
Q54	E-vol mute SW	When a base gose Hi, mute SW is turned on.

4

KDC-7024/Y,722,8023

COMPONENTS DESCRIPTION

Ref. No.	Application/Function	Operation/Condition/Compatibility
Q55, 56	Pre-out mute SW	When a base gose Hi, Pre-out is muted.
Q59, 60	Pre-out mute SW	When a base gose Hi, Pre-out is muted.
Q63	E2P 5V SW	When Q63’base gose Lo, E2P 5V is out.
Q102, 103	AM+B SW	When Q102’base gose Hi, AM+B is out.
Q104	Composite signal buffer for RDS

MICROCOMPUTER’S TERMINAL DESCRIPTION

● SYSTEM MICROCOMPUTER : UPD703030GC015 (X25-966 : IC1)

	Pin No.	Pin Name	I/O	Module	Purpose / Description	Truth table	Processing Operation
	1	PLL_DATA	I/O	Tuner	Data output/input with F/E.
	2	AM+B	I/O	Power supply	AM+B.		AM operation : H
	3	(FM+B)	O	Power supply	FM+B (S01 F/E only).		FM operation : H,
							Last FM : H (With RDS, RBDS model)
	4	V_ILL PAN_E2P DATA	I/O	To panel	V-ILL D/A converter (V-ILL, LCD), E2PROM data.
	5	V_ILL PAN_E2P CLK	I/O	To panel	V-ILL D/A converter (V-ILL, LCD), E2PROM clock.
	6	EVDD	-
	7	EVSS	-
	8	AFS	O	Tuner	Noise detection time constant switching.		FM seek, AF search : L, Receiving : H, Auto 0 : L
	9	BEEP	O	Audio	Beep output.
	10	REMO	I	Extra	Remote control input (Panel, External display).
	11	P_MUTE	O	Audio	Power IC MUTE output.		Power OFF : L, All OFF : L, TEL mute : L
	12	(SVR)	O	Audio	Power IC SVR discharge circuit control.		Power OFF momentary power dropped
							: H (5 second) and then L
				CD	CD mechanism data line.
	13	IC2_SDA	I/O	Audio	IC2 data line.
				Extra	ROM correction data line.
				CD	CD mechanism clock line.
	14	IC2_CLK	I/O	Audio	IC2 clock line.
				Extra	ROM correction clock line.
	15	P_STBY	O	Audio	Power IC STBY output.		Power IC ON : H, Power IC OFF : L, All OFF : H
	16	P_CON	I/O	Extra	Power control.		Power ON : H, Power OFF : Hi-Z, All OFF : Hi-Z
	17	DIMMER_CONT	O	To panel	Dimmer control (W-LED only).		Dimmer : Pulse control,
							Frequency : 1kHz, Normally : H
	18	TEST	-				Connect to GND.
	19	TYPE2	I	Extra	Destination select.	w
		NC	O	Extra	NC (MP3 mechanism model).	w	Output : L
	20	MUTE	O	Audio	Mute output.		ON : OPEN, OFF : L
	21	PRE_MUTEL	O	Audio	PREOUT (L ch) mute.		M MUTE L is L : L (CD), Momentary power
							dropped : L, 2 zone, NAVI interrupt : Fixed H
	22	PRE_MUTER	O	Audio	PREOUT (R ch) mute.		M MUTE R is L : L (CD), Momentary power
							dropped : L, 2 zone, NAVI interrupt : Fixed H

5

KDC-7024/Y,722,8023

MICROCOMPUTER’S TERMINAL DESCRIPTION

	Pin No.	Pin Name	I/O	Module	Purpose / Description	Truth table	Processing Operation
	23	BU_DET	I	Extra	Momentary power dropped detection.		Backup : L,
							No backup, momentary power dropped : H
	24	ACC_DET	I	Extra	ACC detection.		With ACC : L, Without ACC : H
	25	SW5V	I/O	Power supply	5V power supply.		ON : L, OFF : Hi-Z
	26	EXT_AMP_CONT	O	Extra	External amplifier control.		Refer to external amplifier control.
		NC	O		NC (Without EXT_AMP_CONT model)		Output : L
	27	DIMMER	I	Extra	Small lamp detection.		ON : L, OFF : H
	28	ANT_CON	O	Extra	Antenna control.	w	Tuner ON : H, Other source With RDS last FM
							: H, Other source with RDBS TI ON last FM : H
	29	P_ON	I/O	Power supply	SW 14V, SW 5V control, AD reference		Power ON : H, Power OFF : Hi-Z
					voltage control output.
	30	ILL_ON	I/O	Power supply	FL, illumination output.		ON : H, OFF : Hi-Z
	31	RESET	-
	32	XT1	-		Sub clock.		32.768kHz
	33	XT2	-		Sub clock.		32.768kHz
	34	REGC	-				Connect to 1 F capacitor.
	35	X2	-		Main clock.		20MHz
	36	X1	-		Main clock.		20MHz
	37	VSS	-
	38	VDD	-
	39	CLKOUT	-
	40	LX_REQ_M	O	LX	Communication request to external slave.		Request : L
	41	LX_MUTE	I	LX	Mute request from external slave.		Mute ON : H
	42	LX_CON	O	LX	External slave select.		ON : H, OFF : L
	43	LX_RST	O	LX	Reset output to external slave -com.		Normally : L, After system reset : H (400ms
							or more) and then L
	44	NC	O		NC (Without WMA, MP3 model)		Output : L
	45	TYPE0	I	Extra	Destination select.	w
	46	TYPE1	I	Extra	Destination select.	w
	47	IC2_TYPE0	I	Extra	IC2 destination.	w
	48	IC2_TYPE1	I	Extra	IC2 destination.	w
	49	NC	O		NC		Output : L
	50	E2P5V	I/O	Power supply	E2PROM, DA converter power supply control.		ON : L, OFF : Hi-Z
	51	DSI	I/O	To panel	DSI control.		ON : L, OFF : Hi-Z
	52	L_CE	O	To panel	Chip enable output to LCD driver.
	53	L_INH	O	To panel	Inhibit signal output to LCD driver.		Normally : H, Reset, momentary power dropped : L
	54	VOL A	I	To panel	VOL input.
	55	BVDD	-
	56	BVSS	-
	57	VOL B	I	To panel	VOL input.
	58	M_RST	O	CD	Reset output to CD mechanism.		Normally : H, Reset : L (Per mechanism control)
	59	M_STOP	O	CD	Stop request to CD mechanism.		Stop : L, CD : H
	60	CD_SW3	I	CD	DC down switch detection.		Chucking : H
	61	LO/EJ	I/O	CD	CD mechanism loading/eject switch.		Stop, brake : Hi-Z, Loading : L, Eject : H
	62	MOSW	O	CD	CD mechanism motor driver switch.		Loading, eject, brake : H
	63	FPM MOTOR B	O	P-mecha	FPM mechanism (Slider) control.	e

6

KDC-7024/Y,722,8023

MICROCOMPUTER’S TERMINAL DESCRIPTION

	Pin No.	Pin Name	I/O	Module	Purpose / Description	Truth table	Processing Operation
	64	FPM MOTOR F	O	P-mecha	FPM mechanism (Slider) control.	e
	65	FPM MOTOR O	O	P-mecha	FPM mechanism (Angle) control.	e
	66	FPM MOTOR C	O	P-mecha	FPM mechanism (Angle) control.	e
	67	O_DATA	I/O	Extra	External display data input/output.		External display
		NC	O		NC (Without external display model)		Output : L
	68	O_CLK	I/O	Extra	External display clock input/output.		External display
		NC	O		NC (Without external display model)		Output : L
	69	O_CE	I/O	Extra	External display chip enable input/output.		External display
		NC	O		NC (Without external display model)		Output : L
	70	M_MUTER	I	CD	Mute request form CD mechanism. (R ch).		ON : L (CD)
	71	AVDD	-
	72	AVSS	-
	73	AVREF	-		Connect to P_ON (29 pin).
	74	M_MUTEL	I	CD	Mute request form CD mechanism. (L ch).		ON : L (CD)
	75	PAN_DET	I	To panel	Panel E2PROM detection.		With : L, Without : H
		PHONE	I	Extra	PHONE detection.		TEL mute : 1V or less, NAVI mute : 2.5V or more,
	76						J type 1V or less, 2.5V or more : NAVI mute
		NC	I		NC (Without TEL-MUTE model)		Connect to GND.
	77	FPM SW4	I	P-mecha	FPM mechanism position detection,	e	3.75V or more : No mechanism,
					mechanism detection.		1.25V or more : H, Less than 1.25V : L
	78	FPM SW1	I	P-mecha	FPM mechanism position detection.	e
	79	FPM SW2	I	P-mecha	FPM mechanism position detection.	e
	80	FPM SW3	I	P-mecha	FPM mechanism position detection.	e
	81	FPM PHOUT	I	P-mecha	FPM mechanism position detection.	e	H : 2.2V or more
	82	S_METER	I	Tuner	S-meter detection.		Refer to S03 F/E control.
	83	NOISE	I	Tuner	FM noise detection.		Refer to S03 F/E control.
	84	IFC_OUT	I	Tuner	F/E IFC OUT input.		With station : 2.5V or more, refer to S03 F/E control.
	85	NC (POWER_DET)	I	Extra	Power IC DC offset detection.		03 model not used. Connect to GND.
	86	NC	O		NC (Except J type)		Output : L
	87	R_CLK	I	Tuner	RDS decoder clock input.
		NC	I		NC (Without RDS, RBDS model)		Connecto to GND.
	88	LX_REQ_S	I	LX	Receive request from external slave.		Request : L
	89	KEY_REQ	I	To panel	Communication request from LCD driver
	90	CD_SW1	I	CD	Loading switch detection.		Loading start power off : L
	91	CD_SW2	I	CD	12cm disc detection switch.		12cm disc power off : L
	92	R_QUAL	I	Tuner	RDS decoder QUAL input.
		NC	I		NC (Without RDS, RBDS model)		Connecto to GND.
	93	R_DATA	I	Tuner	RDS decoder data input.
		NC	I		NC (Without RDS, RBDS model)		Connecto to GND.
	94	LX_DATA_S	I	LX	Data input from external slave.
	95	LX_DATA_M	O	LX	Data output to external slave.
	96	LX_CLK	I/O	LX	Clock input/output with external slave.
	97	L_DATAL	I	To panel	Data input from LCD driver.
	98	L_DATAS	O	To panel	Data output to LCD driver.
	99	L_CLK	O	To panel	Clock output to LCD driver.
	100	PLL_CLK	I/O	Tuner	Clock input/output with F/E.

7

KDC-7024/Y,722,8023

MICROCOMPUTER’S TERMINAL DESCRIPTION

Truth table

w Destination port

	MODEL	Destination	DISPLAY	TYPE2	TYPE1	TYPE0
	KDC-X969	K	FL	0	0	0
	KDC-MP922	K	FL	0	0	1
	FX-9000	J	FL	0	1	0
	KDC-PSW9524	E	FL	1	0	0
	KDC-9023R	M (E)	FL	1	0	1
	KDC-X869	K	FL	0	1	1
	KDC-8024	E	FL	-	-	-
	KDC-MP822	K	LCD	-	0	0
	KDC-M7024	E	LCD	-	0	1
	FX-5000	J	LCD	-	1	0
	KDC-V7022	K	LCD	0	0	0
	KDC-X769	K	LCD	0	0	1
	KDC-722	K	LCD	0	1	0
	KDC-7024	E	LCD	0	1	1
	KDC-7024Y
	KDC-8023	M (K)	LCD	1	0	0

Note : When FL model using TYPE2, K & J type (with ANT_CON model) : L, E type (without ANT_CON model) : H

Destination(IC2)

				TYPE0	TYPE1
Market model				L	L
Market model CRSC modiification				L	H
OEM model CRSC modification				H	L
OEM model CRSC and de-emphasis modification				H	H
e FPM MOTOR
Slide		FPM mechanism operation
FPM MOTOR B	FPM MOTOR F
0	0	Standby
1	0	Backward operation
0	1	Forward operation
1	1	Brake
Angle		FPM mechanism operation
FPM MOTOR O	FPM MOTOR C
0	0	Standby
1	0	Angle open direction
0	1	Angle close direction
1	1	Brake

8

KDC-7024/Y,722,8023

TEST MODE

●How to enter the test mode

While pressing and holding the Preset 1 and Preset 3 keys, reset the unit.

●How to exit from the test mode

While holding the Preset 6 key, reset the unit.

(Note) The test mode cannot be terminated by reset the unit, ACC OFF, power OFF and Panel detached, momentary power down.

●Initial status in the test mode

•Sources : ALL OFF

•Display : All segments are lit.

•Volume : -10 dB (displayed as “30” )

•Loudness : OFF

•CRSC : OFF regardless of the presence of switching function.

•SYSTEM Q : Flat

•WOW : All OFF

•BEEP : When pressing any keys, the buzzer generates a beep at any time.

•AUX : ON

•MENU SYSTEM Q : OFF

•Variable model : Default is white

•Multifunction : Source dependency (Preset, SCAN, etc.)

● Special display in Tuner mode

When any of the following messages is displayed in Tuner mode, the F/E may be abnormal.

•“TNE2P NG” : The EEPROM is set to the default (unstable values) because the F/E was shipped without passing through the adjustment process, etc.

•“TNCON NG” : Communication with the F/E is not possible.

● Forced switching of K3I

Each press of the Preset 6 key in Tuner mode should switch K3I from AUTO → Forced Wide → Forced Middle → Forced Narrow → AUTO.

The initial status is AUTO and the display shows these modes as follows.

•AUTO : FMA

•Forced Wide : FMW

•Forced Middle : FMM

•Forced Narrow : FMN

● Test mode specifications of the CD receiver

•Forced ejection is inhibited in the reset start operation. When the unit is reset while a CD is loaded in it, the CD is not recognized by resetting.

•Each press of the Track Up key jumps to the following track numbers:

No. 9 →	No. 15 →		No. 10 → No. 11 → No. 12 → No. 13 →
No. 22 →	No. 14	→	No. 9 (The cycle restarts from here.)

•Each press of the Track Down key jumps to the previous track number to the track being played.

•When the number of total trucks of the MP3 disc or the WMA disc is less than 9, 1st truck is played.

•When the disc media is CD, A short press of the Preset 1 key jumps to the track number 28.

•When the model is equipped the CD mechanism assembly adapted for MP3 or MP3/WMA disc, the mechanism name and version number are displayed during the FL model is lower stand and Display mode of LCD model is DNPS.

● Audio-related specifications

•Pressing the key on the remote initiates the audio adjustment mode.

•BL/F key on the Fader initials.

•Continuous holding of a remote control key is inhibited, and workings are short press of any keys.

•Bass, Middle and Treble are adjusted in 3 steps of -8 / 0 / +8 with the Track Up/Down keys (Default value at 0).

•Balance is adjusted in 3 steps of L15 / 0 / R15 with the Track Up/Down keys (Default value at 0).

•Fader is adjusted in 3 steps of R15 / 0 / F15 with the Track Up/Down keys (Default value at 0).

•HPF is adjusted in 2 steps of OFF / 170Hz (or 220Hz) with the Track Up/Down keys (Default value at OFF).

•LPF is adjusted in 2 steps of OFF / 120Hz with the Track Up/Down keys (Default value at OFF).

•Bass f, Bass Q, Bass EXT, Middle f, Middle Q and Treble f are not dealt with by the audio adjust.

•The WOW key pass during the audio adjustment as following steps.

	Order		Mod.		Display
		TruBass	FOCUS	SRS
	q	OFF	OFF	OFF	SRS WOW OFF
	w	ON	OFF	OFF	SRS TruBass ON
	e	OFF	LOW	OFF	FOCUS LOW
	r	OFF	HIGH	OFF	FOCUS HIGH
	t	OFF	OFF	ON	SRS ON
	y	ON	HIGH	ON	SRS WOW HIGH

9

KDC-7024/Y,722,8023

TEST MODE

● Menu-related specifications

•A short press of the Q key initiates the menu mode.

•Pressing the DNPP key on the remote initiates the Menu mode.

•Continuous holding of a remote control key is inhibited, and workings are short press of any keys.

•Contrast is adjusted in 3 steps of 0 / 5 / 10 with the Track Up/Down keys (Default value at 5).

●Backup current measurement

When the unit is reset while ACC is OFF (i.e. by turning Backup ON), the MUTE terminal goes OFF in 2 seconds in place of 15 second. (The CD mechanism is not activated at this time.)

●Special display when the display is all on

Pressing the Preset keys while the power is ALL OFF displays the following information.

[PRESET 1]	Version display (8 digits, Month/Day/Hour/Minute)
	(Display) SYS xxxxxxxx : System microcomputer
	PAN xxxxxxxx : FL model only
	MEM xxxxxxxx : 4 contrasts FL model only
[PRESET 2]	Serial number display (8 digits)
	(Display) SNo xxxxxxxx
[PRESET 3]	Short press : View power ON time. (The All OFF
	period is not counted.)
	2 seconds long press/hold : Clear power ON time
	at the power ON time displaying.
	(Display) PonTim xxxxx	Max. 60000 (hours)
[PRESET 4]	Short press : Display CD operation time.
	2 seconds long press/hold : Clear CD operation
	time at the CD operation time displaying.
	(Display) CDTim xxxxx	Max. 60000 (hours)
[PRESET 5]	Short press : Display CD ejection count.
	2 seconds long press/hold : Clear CD ejection
	count at the CD ejection count displaying.
	(Display) EjeCnt xxxxx	Max. 60000 (times)
[PRESET 6]	Short press : Display Panel open/close count.
	2 seconds long press/hold : Clear Panel open/close
	count at the Panel open/close count.
	(Display) PnCnt xxxxxx	Max. 600000 (times)
FM key	Display ROM collection version.
	(Display) ROM R xxx	Invalid : “R – – –”
AM key	Display panel E2PROM condition.
	(Display) P–ROM OK (Registered code)
	P–ROM NG (Code is write in error)
	P–ROM WAIT (Unregistered code)
	P-ROM NON (Panel security nonfunctional)

● Panel mechanism

•Auto-panel close inhibition when set-in the CD.

•The panel operation inhibition at power ON/OFF and ACC ON/OFF.

• The panel position changing Eject ← → Last with a short press of the PLAY/PAUSE keys.

● Other specifications

•No displays such as “CODE OFF/ON” during Power-ON.

•The LINE MUTE inhibition time is one second from 10 seconds when start-up the test mode.

•Do not write the security code with the security jig on the test mode.

•Do not write the serial with the serial writing jig on the test mode.

•OEM display output is not stop if OEM display not connection on the test mode.

●Switching the frequency span (K/M type)

While holding the Preset 1 key and Preset 5 key, reset the unit.

●Response to OEM setting

(Destination of electronic volume setting)

S03F/E models are response to OEM models option at put in µ -com 2 pin.

Its setting are following steps.

	IC2 TYPE0	IC2 TYPE1	Description
	(47 pin)	(48 pin)
	Low	Low	q Trade model (Initial quantify)
	Low	High	w Trade model (CRSC change)
	High	Low	e OEM model-ready CRSC change
	High	High	r OEM model-ready CRSC &
			de-emphasis change

● Security-related information

1.Forced Power ON mode (All models)

Even when the security (Cord) is approved, resetting the unit while holding the Q and Preset 4 keys makes it possible to turn the power ON for 30 minutes.

After 30 minutes have elapsed, it is not possible to return to the previous condition unless the unit is reset again. (Security code is do not clear at this mode. Put the power on fillin.)

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KDC-7024/Y,722,8023

TEST MODE

2. Method of registration of the security code after

EEPROM (F/E) replacement (Code security model)

1)Enter the test mode. (See How to enter the test mode)

2)Press the MENU key to enter the Menu mode.

3)When the message “Security” is displayed, press and hold the Track Up/Down key for 1 second to enter the security registration mode.

4)Enter the code using the FM/AM/Track Up/Track Down keys. FM key : Number up

AM key : Number down

Track Up key : Cursor right shift Track Down key : Cursor left shift

5)Hold down the Track Up key for at least 3 seconds and the message, “RE-ENTER” appears, so once again enter the code according to Step 4 above.

6)Press and hold the Track Up key for 3 seconds until “APPROVED” is displayed.

7)Exit from the test mode. (See 2. How to exit from the test mode)

(Note 1) All Clear is not applicable to the security code of this model.

(Note 2) When the F/E changed, need re-inscription because the panel security is clear.

3. Simple way to clear the security code (K type only)

1)During code request mode, press the Track UP key for at least 3 seconds while holding down the AUTO key. (– – – –

will disappear)

2)Enter, “KCAR” with the remote controller as described below.

•Press the remote controller 5 key twice, and press the Track Up key. (Enters a “K” )

•Press the remote controller 2 key three times, and press the Track Up key. (Enters a “C” )

•Press the remote controller 2 key once, and press the Track Up key. (Enters an “A” )

•Press the remote controller 7 key twice, and press the Track Up key. (Enters an “R” )

3)Security function is canceled and unit sets to All-Off mode.

4)Code request mode appears if a mistake was made in entering the numbers.

4. How to inscription the panel security code

1)Enter the test mode.

2)Pressing the AM key on all lighting, check the “P-ROM WAIT” display.

3)The NEXT key is long press 2 seconds, writing the code.

4)Display is “P-ROM OK”.

5)Exit from the test mode.

(Note) E2PROM connection is NG when display is “P-ROM NG”, so detach the panel and rewrite after the display is “P- ROM WAIT”. This code can not clear.

●Check the SRAM

Output (Hi) to the SRAM_CHECK terminal on 101 pin when SRAM is function properly on the panel of 4 gradation FL models.

●Check the Flash ROM

1)Display to the following effect at ALL OFF by assortment system computer and panel for cover the customization model attach the panel with no Flash ROM.

•Customization system computer + Flash ROM panel : All lighting

•Non customization system computer + Non Flash ROM panel : All lighting

•Customization system computer + Non Flash ROM panel

:Panel NG

•Non customization system computer + Flash ROM panel

:Panel NG

2)Output (Hi) to the FLASHROM_CHECK terminal on 102 pin when Flash ROM is function properly.

3)Flash ROM data is initialized when pressing the AM key long hold at all lighting.

Display is “Data Erase ....” in data erasing mode. Do not touch anything this mode. When the data erase completed, display is “Erase OK!!”.

If display is “Erase NG!!!!!!”, Flash ROM data unable erase for some kind or another factors.

When same effect as pressing the AM key long hold and data erase once again, Flash ROM is defective.

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